MarsSeed [1] filed a deletion request for mingw-w64-gtkmm3 [2]: Broken, but unused legacy bindings library pkg from 2021. Dependency 'mingw-w64-atkmm' no longer exists.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/mingw-w64-gtkmm3/
